CONTROL ARRANGEMENT FOR SEAT CARRIER FOR CHAIRS, ESPECIALLY SWIVEL CHAIRS

摘要

A chair frame arrangment has a locking mechanism between an adjustable and fixed frame parts. The locking mechanism is of simple construction and is easy to operate and has a locking pin extending through a frame wall while passing to one side of the wall through a set of lamellae which may move freely in an unlocked pin position. The locking pin has a locking spring on the outside of the wall to urge the pin into its locking position in which a sleeve on the other side of the wall is held against one side of the set of lamellae to clamp and lock them in position. An operating lever is carried upon the outside of the wall and is operational to release spring pressure to allow for adjustment of the adjustable frame part. A mounting is provided for the locking spring and in desired structures this also carries the lever and provides a clamping element which acts on the other side of the set of lamellae to take the clamping pressure of the sleeve. The lever acts against a profiled cam surface at an adjacent end of the locking pin to overcome the action of the locking pin so as to move the pin out of its locking position. 22